Does it still happen in Troubleshoot Mode?

It does, but thank you for the tip on Troubleshoot Mode - didn't know about that option!

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile. Make sure you stay signed out of your sync account when testing.

Thanks for responding, zeroknight. Yes, it still happens. It's only been in the last month that this has been an issue. I thought maybe there was some update that had an adverse effect. I only created a profile in the past couple of days, as I thought that might help. Alas, no. I've attached a screenshot - you can see I'm able to select the box at the top right "Membership" but the options in the drop-down list will not allow me to select anything. I have to switch to Google in order to pull the info I need. Google works for some things, but not all. It would be lovely if everyone played together nicely.

What element gets selected in the Inspector if you right-click a check box ?

You can right-click and select "Inspect" to open the built-in Inspector with this element selected.

• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/open_the_inspector/
• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/examine_and_edit_html/

Good morning, I did open the inspector, but I have absolutely no knowledge about HTML, codes, or whatever that is I'm looking at. I'll take a gander at your links to see if I can figure it out. Thank you very much!

A valid checkbox should appear as an input field (<input type="checkbox" />), in some cases a website uses JavaScript to generate a checkbox.

• https://developer.mozilla.org/en-US/docs/Web/HTML/element/input
• https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox

You can possibly add a screenshot that shows the window (container) in the Inspector.